The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 399
ntly high speed. The positive ions that are formed betweenfilament and grid go to the filament, but those that are formedbetween grid and plate are attracted to the negative plate, thusgiving a current through the galvanometer G; and this currentis a measure of the number of positive ions formed.… … Fig. 229. should be about 200 volts, but depends, of course, on the con-struction of the device. This tj^pe of gauge has the disadvantage that gases affect theemission of electrons from the filament; that is, the saturationcurrent is dependent on the amount and kind of gas coming incontact with the…
Telegraph, Wireless
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